lookman



2 Sheets-Sheet 1.

H. S. LOOKMAN.

Pump.

Patented May 25,1880. I

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N-FEIEHS, PEOTO LITHUGRAPfiER WASHINGTON D C 2 Sheets-sha ot 2. H. S. LOCKM'A'N.

'P ump,

-No. 228,08 9. Patented May 25, I880.

Zia/492%)? UNITED STATES PATENT Urrrcn.

; HENRY S. LOGKMAN, OF OASTLETON, NEW YORK.

PUMP.

SPECIFICATION forming part of Letters Patent No. 228,089, dated May 25, 188i).

Application filed January 26, 1880.

To all whom it may concern:

Be it known that I, HENRY S. LOGKMAN, of the village of New Brighton, town of Castleton, county of Richmond, and State of New York, (post-office address Tompkinsville,) have invented certain new and useful Improvements in Pumps, to be operated by hand, steam, or other power, of which the following is a specification.

My invention consists of a double-acting pump having a valveless piston oscillating or swinging in a triangular piston-chamber, and in other devices, 'all of which will be understood by the following description and claims.

In the accompanying drawings, Figure l is a perspective view of my pump. Fig. 2 is a vertical longitudinal section thereof through the shell and a portion of the piston. Fig. 3 is a transverse vertical section. Fig. 4 represents detached parts.

The construction of my double-acting pump is as follows: The triangular piston-chamber may have the two end walls, A, and the curved floor A cast in one piece. These walls A are a little farther apart at the top than at the bottom, in order to make a better fit of the oscillating piston F, as will be more fully explained when the piston is described.

The side walls, B, of the piston-chamber are set obliquely, being fastened in place by screws or otherwise. The walls of the chamber are completed by the cap D, the joints of which are closed by suitable packing.

The oscillating piston F, to the sides of which is secured the metallic packing I, having at its upper ends the metallic washers, as shown, fits and swings between the two walls A, Fig. 2, said walls being a little wider at the top than at the bot-tom to accommodate themselves to the conformation of the piston. The piston is supported upon the circularterminations or washers of the metallic packing I, (the washers fitting around the trunnions E,) which bear upon semicircular grooves in the top of the walls A, as shown at Q in Figs. 2 and 3. By this construction the joints at the bottom and sides of the piston are tightened .as the parts wear by the slight descent of the piston between the end walls.

The packing of the piston F is very complete. Under the fixed metallic cap D is an adjustable metallic plate, K, suitably accommodated thereto and grooved on its face to adapt itself to the crown of the piston, and provided with leather or other suitable packing, 70, and thumb-screw k, by which means the crown of the piston is kept sufficiently packed, while the lower edge of the piston is held in proper relative position to the curved floor A.

The vertical edges of the piston have grooves, into which the plates I, Fig. 4, are fitted with suitable packing of an elastic nature, the washer at the top of this plate fitting around the trunnion E, as seen in section, Fig. 2.

The lower edge of the piston has a metallic packing, G, with other suitable elastic packing, H, Figs. 3 and at. This packing prevents the friction and wear between the piston and chamber. The elastic packing H holds the metallic packing I and G in proper working position, and yet allows free motion without undue friction between the piston and walls of the chamber. Motion may be given to the piston by means of the oscillating lever L, Fig. 1, or by any other suitable means.

. Attached to'the oblique sides of the pistonbranch, as seen in dotted lines at T, Fig. 2, the

same being attached .on the outside of the walls B of the piston-chamber and opening outward to discharge the water. By this construction the valves are all accessible from the outside of the piston-chamber by simply loosening the screws X (or other fastenings) which connect the branching tubes M and N to the side walls, B, of the triangular chamber, Figs. 1 and 3.

As the piston is swung to the right the valve R upon that side is closed by the pressure of the water, while the discharge-valve T on the same side is opened, and thus the stroke of the piston discharges the waterfrom the chamher on the right-hand side. At the same time the supply-valve on the opposite side is opened and the discharge-valve closed. Then the reverse stroke of the piston opens the dischargevalve on the left-hand and closes the supplyvalve.

The discharge-openings are situated in the sides of the piston-chamber opposite the broad face of the piston, which travels directly to such discharge and drives the water in the shortest direction to its exit from the chamber, thus easily and completely emptying the same.

The supply-valves, on account of their peculiar location in the sides of the triangular chamber, admit the Water. so that the inflowin g current strikes the broad surface of the piston, equally distributing its force, and thus assists in expelling the water from the chamber on the opposite side of said piston. This I have determined by practical experiment.

Having thus described my invention, What I claim, and desire to secure by Letters Patent, is-

1. In a double-actin g pump,a triangular piston chamber having discharge and supply passages located on opposite sides of said chamber and directly facing the broad surfaces of the piston, in combination with a valveless piston swinging between said discharge and supply passages, substantially in the manner and for the purposes set forth.

2. In a double-acting pump, an oscillating valveless piston having the described end and bottom packings, in combination with the triangular chamber having inclined end walls, whereby the wear is compensated for, substantially as shown and set forth.

3. In a double-acting pump, a valveless piston, in combination with the metallic and elastic packing in the ends and bottom of said piston, constructed substantially in the manner and for the purposes set forth.

4. In a double-acting pump,.the combination of an oscillating piston with a fixed metallic cap, an adjustable plate and thumb-screw, and elastic packing. substantially in the manner and for the purposes set forth.

5. In a double-acting pump, the combination, with an oscillating valveless piston and a triangular chamber, of branching supply and discharge pipes and valves located on both sides of said triangular chamber, the same being accessible from the outside thereof, substantially as and for the purposes set forth.

HENRY S. LOOKMAN.

\Vitnesses:

J. VAN TAPELL, ABRAHAM A. BOYD. 

